How to make this separation between threads blocks

[gnrx]

Yes, I know this, I have also this mod for separate stick threads.

But my doubt is other, in my last post, in the image of this other forum, in the blocks of threadlist, appears a blank line separate stick threads and normal threads.

In my forum, using algo a separate stick threads, the threadlist not appears this blank line separate.

I attach a image of my forum.

Thanks and regards.